version no 1.4.0. there is no random picture choosen from every category, when i'm in the home map.. i thought this was a very good feature of the formal versions, becouse "old" categorys are more visited when the thumbnail changes.
are you planning to implement this in future versions?

This feature will come back in branch 1.5, and will be optional with $conf['allow_random_representative'] in include/config_*.inc.php. If this parameter is set to "true", then you'll can choose to let PWG choose a different representant randomly at each display.